chain guide

Abstract

The present application provides a chain guide capable of improving transportability and workability during installation while ensuring stable movement of a timing chain and improving durability. The chain guide (100) includes a guide block that slidably guides a chain, and a chain guide body that supports the guide block. A pressure-limiting sleeve (150) having a mounting hole (151) is inserted into a fixing through hole (111) that passes through the chain guide body (110) in the width direction. A mounting bolt for mounting the chain guide to a mounting member is inserted into the mounting hole (151). A pressure-limiting sleeve retaining mechanism that retains the pressure-limiting sleeve is provided on a hole peripheral edge portion (120) of the fixing through hole on the chain guide body or on the pressure-limiting sleeve.

Description

Technical Field

[0001] The present invention relates to a chain guide, comprising: a guide block for slidingly guiding a chain; and a chain guide body supporting the guide block. Background Technology

[0002] In the past, in order to keep the chain moving between sprockets stable and properly tensioned, chain guides with guide blocks that slide to guide the moving chain were typically used.

[0003] For example, such as Figure 10 As shown, there is a known engine timing system that moves a transmission chain CH, such as a roller chain, which rotates seamlessly between sprockets S1 and S2 of the crankshaft and camshaft respectively located in the engine compartment E. The timing chain CH rotates seamlessly between the drive sprocket S1 of the crankshaft installed in the engine compartment E and a pair of driven sprockets S2 installed on the camshaft. The timing chain CH is guided by a chain guide (oscillating guide) 600 and a chain guide (fixed guide) 500 that oscillate.

[0004] The chain tensioning device T suppresses vibration while maintaining the tension of the timing chain CH appropriately by pressing the oscillating guide 600.

[0005] In such a timing system, the fixed guide 500 is fixed in the engine compartment E by multiple fixing bolts Q, and the swing guide 600 is installed in the engine compartment E in a swinging manner with the swing mounting bolt P as the center, which can swing in the hanging rotation plane of the timing chain CH (for example, refer to references 1 to 3).

[0006] The known chain guide (swing guide) 600 and chain guide (fixed guide) 500 used in such timing systems are composed of a guide block that slides to guide the moving chain and a chain guide body that supports and reinforces the guide block along the direction of chain movement. The chain guide body is formed of synthetic resin. On the other hand, since the mounting bolts P and Q used to fix these chain guides 500 and 600 to the mounted component, i.e., the engine compartment E, are made of metal, the mounting bolts P and Q may loosen due to the difference in thermal shrinkage between the mounting bolts P and Q and the resin chain guide body caused by the heat during the timing system operation. As a result, the chain guide becomes loose in the installed state, and there is a problem that the stable movement of the timing chain cannot be ensured.

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2017-078486

[0009] Patent Document 2: Japanese Patent Application Publication No. 2011-127741

[0010] Patent Document 3: Japanese Patent Application Publication No. 10-238604 Summary of the Invention

[0011] To mitigate the problem of loosening of the chain guide due to such thermal shrinkage difference, a metal bushing made of the same material as the mounting bolt is sandwiched between the inner circumferential surface of the through hole for fixing the mounting bolt on the chain guide and the mounting bolt, thereby alleviating the thermal shrinkage difference between the mounting bolt and the chain guide.

[0012] However, during installation on the engine compartment, the component to which the chain guide is installed, even though the chain guide body and the metal bushing inserted into its fixing through hole are made as a single unit, there is a problem that the metal bushing may fall off during the process of inserting the metal bushing into the fixing through hole of the chain guide body and connecting the mounting bolts to the threaded holes formed on the mounting surface of the engine compartment. This makes installation difficult even for operators using both hands, reducing work efficiency. Furthermore, the metal bushing may also fall off during the transport of the chain guide.

[0013] The present invention is made to solve the above-mentioned problems. The technical problem to be solved is to provide a chain guide that can improve transportability and workability during installation through a simple structure, while ensuring stable movement of the timing chain and improving durability.

[0014] The chain guide of the present invention comprises: a guide block for slidingly guiding the chain; and a chain guide body supporting the guide block.

[0015] A pressure-limiting sleeve with a mounting hole is inserted into a through hole in the width direction of the chain guide body. The mounting bolt for mounting the chain guide to the component being mounted is inserted through this mounting hole.

[0016] The aforementioned problem is solved by providing a pressure-limiting sleeve holding mechanism on the periphery of the through hole for fixing on the chain guide body or on the pressure-limiting sleeve.

[0017] According to the chain guide of the present invention, since a pressure-limiting sleeve retaining mechanism is provided on the periphery of the hole containing the fixing through hole on the chain guide body or on the pressure-limiting sleeve itself, the pressure-limiting sleeve is essentially sandwiched between the chain guide body and the mounting bolt. Therefore, the thermal shrinkage difference generated between the mounting bolt and the chain guide body is alleviated, thereby ensuring stable movement of the timing chain, improving durability. Moreover, the pressure-limiting sleeve retaining mechanism prevents the pressure-limiting sleeve from falling off the chain guide body during transportation, thereby improving transportability. Even when installed on the component to be installed, the pressure-limiting sleeve retaining mechanism can prevent the pressure-limiting sleeve from falling off the chain guide body, thus enabling installation on the component to be installed and improving workability during installation.

[0018] According to the present invention, the chain guide with a tapered structure formed by the inner circumferential surface of the fixing through hole that tapers toward one side towards the axial direction can easily retain the pressure-limiting sleeve when it is inserted into the fixing through hole in the tapering direction, thus improving the operability and transportability during installation with a simple structure.

[0019] According to the present invention, a chain guide with a thin slice formed between the annular recess and the inner circumferential surface of the fixing through hole at the periphery of the hole provides elasticity due to the ease of bending of the thin slice and the resulting flexural allowance. This elasticity within the fixing through hole ensures that the pressure-limiting sleeve is reliably held in place by the elasticity of the fixing through hole, effectively preventing it from detaching from the chain guide body and further improving workability and transportability during installation. Furthermore, the annular recess functions as an oil reservoir, enhancing the oil retention around the fixing through hole and improving vibration damping performance. When the chain guide is a fixed guide, the risk of wear and breakage is reduced; even when the chain guide is a movable guide, the improved lubricity of the oil reduces the risk of wear on the sliding parts, thereby extending its service life.

[0020] The chain guide according to the present invention is composed of a plurality of arc-shaped grooves formed by a bridging structure. Since the bridging structure can suppress bending of the annular recess, the strength of the annular recess can be improved.

[0021] According to the present invention, the chain guide with a locking portion formed on the pressure limiting sleeve and locking to the periphery of the hole prevents the pressure limiting sleeve from falling off the chain guide body, thereby further improving the workability and transportability during installation.

[0022] According to the present invention, the chain guide with a concave-convex structure formed on the inner circumferential surface of the fixing through hole can generate friction between the concave-convex structure on the inner circumferential surface of the fixing through hole and the outer circumferential surface of the mounting bolt, thus reliably preventing the pressure-limiting sleeve from falling off the chain guide body, and further improving the workability and transportability during installation.

[0023] The chain guide according to the present invention has a structure in which the periphery of the hole is integrally formed with the chain guide body. Since the manufacturing burden can be reduced by reducing the number of manufacturing processes, the chain guide can be manufactured with high productivity. Attached Figure Description

[0024] Figure 1 This is a front view showing an example of a chain guide (fixed guide).

[0025] Figure 2 This is a perspective view of the periphery of the hole and the pressure limiting sleeve of the chain guide according to the first embodiment of the present invention.

[0026] Figure 3 yes Figure 2 A three-dimensional sectional view of the periphery of the hole and the pressure-limiting sleeve.

[0027] Figure 4 yes Figure 2 A cross-sectional view of the periphery of the hole and the pressure-limiting sleeve.

[0028] Figure 5 It is an enlarged representation Figure 2 A partial cross-sectional view of a portion of the periphery of the hole.

[0029] Figure 6 This is a perspective view showing other examples of through holes for fixing.

[0030] Figure 7 This is a partial cross-sectional view showing a modified example of the periphery of the hole in the chain guide according to the first embodiment of the present invention.

[0031] Figure 8 This is a cross-sectional view of the periphery of the hole and the pressure limiting sleeve of the chain guide according to the second embodiment of the present invention.

[0032] Figure 9 This is a front view showing an example of a chain guide (oscillating guide).

[0033] Figure 10 This is a schematic diagram of the timing system of an existing engine.

[0034] Symbol Explanation

[0035] 100, 300, 500 - Chain guide (fixed guide); 400, 600 - Chain guide (oscillating guide); 110, 310, 410 - Chain guide body; 111, 211, 311, 411 - Through hole for fixing; 120, 220, 320, 420 - Peripheral part of the hole; 121 - Conical part; 122, 222, 322 - Annular recess; 123, 223, 323 - Thin Slice; 124-Bridging structure; 125-Arc groove-shaped recess; 126-Concave-convex structure; 150-Pressure limiting sleeve; 151-Mounting hole; 152-Cylindrical body; 153-Flange; 154-Locking part; S1-Drive sprocket; S2-Driven sprocket; CH-Timing chain; P-Mounting bolt (for swinging); Q-Mounting bolt (for fixing); T-Chain tensioning device; E-Engine compartment (installed component). Detailed Implementation

[0036] The chain guide of the present invention comprises: a guide block for slidingly guiding a chain; and a chain guide body supporting the guide block. A pressure-limiting sleeve having a mounting hole is inserted into a fixing through hole passing through the width direction of the chain guide body. A mounting bolt for mounting the chain guide to a mounted component is inserted through the mounting hole. A pressure-limiting sleeve retaining mechanism is provided at the periphery of the hole including the fixing through hole on the chain guide body to retain the pressure-limiting sleeve. Therefore, the pressure-limiting sleeve is essentially sandwiched between the chain guide body and the mounting bolt. Therefore, the thermal shrinkage difference between the mounting bolts and the chain guide body is alleviated, ensuring stable movement of the timing chain, improving durability, and preventing the pressure-limiting sleeve from falling off the chain guide body during transportation by a pressure-limiting sleeve retaining mechanism. At the same time, even when installed on the component being installed, the pressure-limiting sleeve retaining mechanism can also prevent the pressure-limiting sleeve from falling off the chain guide body, thus making it easy to install on the component being installed and improving workability during installation. As long as such a chain guide is provided, its specific structure can be arbitrary.

[0037] Example 1

[0038] The chain guide according to the first embodiment of the present invention is used in a timing system installed in an engine compartment. It is fixed to the engine compartment, which is the mounted component, and slides to guide the chain moving between sprockets. The chain guide 100 includes: a guide block for sliding to guide the moving chain along the length direction of the guide; a chain guide body 110 for being detachably mounted to and supporting the guide block; and a pressure-limiting sleeve 150 inserted into a fixing through hole 111 formed in a way that passes through the width direction (guide width direction) of the chain guide body 110, and having a mounting hole 151 through which a mounting bolt for mounting the chain guide 100 to the mounted component is inserted.

[0039] The chain guide body 110 is made of synthetic resin. When the chain guide 100 is a fixed guide, such as... Figure 1 As shown, through holes 111 are fixed on the chain guide body 110 at three locations along the guide length of the chain guide body 110, and pressure sleeves 150 are inserted into each of these locations.

[0040] like Figures 2 to 4 As shown, on the periphery 120 of the fixing through hole 111 of the chain guide body 110, a portion is formed on the inner circumferential surface of the fixing through hole 111, which is located on one side of the fixing through hole 111 (from...). Figure 4 (From the right side to the left) and the tapered cone 121 with a narrowed diameter.

[0041] Additionally, an annular recess 122 is formed on the periphery of the hole 120. While following the outer edge shape (circular) of one end of the fixing through hole 111, it separates from the outer edge of the fixing through hole 111 by a small interval and extends from one side of the chain guide body 110. Figure 4 The left side of the annular recess 122 is recessed in the width direction. Furthermore, a thin slice 123 is formed on the inner circumferential wall of the annular recess 122 on the side of the fixing through hole 111 between the inner circumferential surface of the annular recess 122 and the inner circumferential surface of the fixing through hole 111.

[0042] Thin slice 123 is formed in the conical portion 121, thereby placing the thin slice 123 in a state within the fixing through hole 111, accompanied by the other side ( Figure 4 (right side) towards one side ( Figure 4 (on the left side) and extends slightly toward the radially inward side of the fixing through hole 111.

[0043] The length of the thin slice 123 of the inner peripheral wall of the annular recess 122 ( Figure 4 The length in the left-right direction is lower than the height of the chain guide body 110, which forms the outer circumferential wall of the annular recess 122. Therefore, when the locking part 154 of the pressure limiting sleeve 150 described later is engaged in a state covering the inner edge region of the top part of the thin slice 123, the pressure limiting sleeve 150 can be prevented from protruding from the chain guide body 110.

[0044] The thickness of the thin slice 123 is, for example, about 0.5 mm, and the length of the guide in the width direction of the thin slice 123 is, for example, about 2.0 mm.

[0045] The annular recess 122 is composed of multiple arc-shaped grooves 125 divided by the bridging structure 124. In the annular recess 122, the multiple arc-shaped grooves 125 are arranged at equal angles.

[0046] like Figure 5As shown, a concave-convex structure 126 is formed on the inner circumferential surface of the through hole 111 for fixing, specifically on the inner circumferential surface of the thin slice 123 of the conical portion 121.

[0047] The pressure relief sleeve 150 is made of the same metal as the mounting bolts used for mounting on the mounted component, i.e., the engine compartment, and is used to prevent deformation caused by the difference in thermal shrinkage between the synthetic resin chain guide body 110 and the mounting bolts.

[0048] The pressure-limiting sleeve 150 has: a cylindrical body 152 with an internal mounting hole 151; a flange 153 protruding radially outward from the root edge of the cylindrical body 152; and a locking portion 154 protruding slightly radially inward from the top edge of the cylindrical body 152. The mounting hole 151 functions as a hole for inserting a mounting bolt, which serves as a mounting shaft for mounting the chain guide 100 to the mounted component, i.e., the engine compartment.

[0049] The locking portion 154 of the pressure-limiting sleeve 150 is configured to engage with one side of the periphery portion 120 of the hole in the chain guide body 110. Specifically, it is configured to hook onto the thin slice 123 by the inner edge region of the top end of the thin slice 123 covering the periphery portion 120 of the hole. That is, the pressure-limiting sleeve 150 is formed such that the flange portion 153 and the locking portion 154 can clamp the through hole 111 for fixing.

[0050] The protruding length of the locking part 154 on the pressure limiting sleeve 150 is about 0.1 mm.

[0051] Furthermore, in the chain guide 100 of this embodiment, a pressure-limiting sleeve retaining mechanism is provided on the periphery 120 of the through hole 111 for fixing the chain guide body 110 to retain the pressure-limiting sleeve 150. The pressure-limiting sleeve retaining mechanism is composed of at least one of the following: a tapered portion 121 of the periphery 120, a thin slice 123, a concave-convex structure 126, and a locking portion 154 of the pressure-limiting sleeve. Although the chain guide 100 of this embodiment is described as having all of the above structures, the pressure-limiting sleeve retaining function can also be achieved by having only one of the above structures. For example… Figure 6 As shown, it can also be a structure that only forms a conical portion 121 and a concave-convex structure 126, without forming an annular recess 122 (thin slice 123).

[0052] The pressure-limiting sleeve 150 can be assembled in the following manner: in the fixing through hole 111 of the chain guide body 110, from the other side of the chain guide body 110 toward one side, the top end side (the locking part 154 side) of the pressure-limiting sleeve 150 is used as the top head and pressed in such a posture that the central axis of the fixing through hole 111 is approximately aligned with the central axis of the cylindrical body 152.

[0053] With the pressure-limiting sleeve 150 inserted into the fixing through hole 111, the pressure-limiting sleeve retaining mechanism holds the pressure-limiting sleeve 150 within the fixing through hole 111. Specifically, the cylindrical body 152 of the pressure-limiting sleeve 150 is held in place by the tapered portion 121 of the fixing through hole 111, the elasticity of the thin slice 123, and the friction of the concave-convex structure 124. Furthermore, since the flange portion 153 contacts the other side of the chain guide body 110, and the locking portion 154 of the pressure-limiting sleeve 150 protrudes towards one side of the fixing through hole 111 and covers the inner edge region of the top end of the thin slice 123 of the hole periphery portion 120, it is locked in a state of hooking onto the thin slice 123, thereby restricting the movement of the pressure-limiting sleeve 150 and preventing the pressure-limiting sleeve 150 from falling off the chain guide body 110. Furthermore, by tightening and fixing the chain guide 100 to the engine compartment while keeping it as a single unit, the chain guide 100 can be easily fixed to the engine compartment without complicated operations, thus improving the workability of the chain guide 100 installation.

[0054] The pressure-limiting sleeves 150 are inserted into the respective fixing through holes 111, and the mounting bolts (not shown) are inserted through the respective mounting holes 151 of the pressure-limiting sleeves 150, so that they are screwed into the threaded holes (not shown) in the engine compartment, thereby installing the chain guide 100. Thus, the chain guide 100 is installed in the fixing through holes 111 formed in the chain guide body 110, with the cylindrical body 152 of the pressure-limiting sleeve 150 sandwiched between the inner circumferential surface of the fixing through hole 111 and the mounting bolt.

[0055] Regarding the installation of the chain guide 100 to the engine compartment, it can be configured such that the flange portion 153 of the pressure limiting sleeve 150 is positioned on the side facing the engine compartment so that it functions as a contact point with the engine compartment when the chain guide 100 has been installed in the engine compartment, or it can be configured such that the locking portion 154 of the pressure limiting sleeve 150 is positioned on the side facing the engine compartment.

[0056] The above, although for in Figure 1 The invention has been described in detail regarding the three fixing through holes 111 in the chain guide 100, specifically the central cylindrical through hole with a circular cross-section perpendicular to the axial direction. However, the invention can also be applied to other applications such as... Figure 7 The two through holes 211 shown are oblong cylindrical in shape with a cross section perpendicular to the axial direction. Figure 7 In the middle, in the periphery 220 of the hole including the fixing through hole 211, an annular recess 222 is formed in the periphery 120 of the hole. While following the outer edge shape (elongated oval) of one end of the fixing through hole 211, it is separated from the outer edge of the fixing through hole 211 by a small interval and is located from one side of the chain guide body 110. Figure 7The annular recess 222 is recessed in the width direction, and a thin slice 223 is formed between the inner circumferential surface of the annular recess 222 and the inner circumferential surface of the fixing through hole 211.

[0057] In the chain guide 100 of this embodiment, a through hole 211 for fixing, which has an elongated cylindrical shape with a cross section perpendicular to the axial direction, is located at both ends of the guide in the length direction.

[0058] Example 2

[0059] like Figure 8 As shown, the chain guide 300 according to the second embodiment of the present invention has an annular recess 322 formed in the peripheral portion 320 of the hole, in addition to the annular recess 122 formed in a state protruding from one side of the chain guide body 310, also having an annular recess 322 formed in a state protruding from the other side of the chain guide body 310. The other structures are the same as those described in the first embodiment. (The second embodiment is shown in...) Figure 8 In the text, parts that have the same structure as the chain guide 100 in the first embodiment are marked with the same symbols.

[0060] Specifically, the annular recess 322 is formed such that, while following the outer edge shape (elongated oval) of one end of the fixing through hole 311, it is separated from the outer edge of the fixing through hole 311 by a small interval and extends from the other side of the chain guide body 110. Figure 8 The right side of the annular recess 322 is recessed in the width direction. Furthermore, a thin slice 323 is formed on the inner circumferential wall of the annular recess 322 on the side of the fixing through hole 311 between the inner circumferential surface of the annular recess 322 and the inner circumferential surface of the fixing through hole 311.

[0061] The chain guide 300, with annular recesses 122 and 322 formed on both sides, benefits from the flexibility of the thin slices 323 and 323 formed on both sides of the fixing through hole 311, which create a flexural allowance. This elasticity of the fixing through hole 311 ensures that the pressure-limiting sleeve 150 is reliably held in place by the elasticity of the fixing through hole 311, preventing it from detaching from the chain guide body 310 and further improving workability and transportability during installation. Furthermore, since the annular recesses 122 and 322 function as oil reservoirs on both sides, the oil retention around the fixing through hole 311 is further improved, enhancing vibration damping performance. The increased lubricity of the oil reduces the risk of wear on sliding parts, thereby extending service life.

[0062] While the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various design changes can be made without departing from the scope of the present invention as set forth in the claims.

[0063] For example, in the above embodiments, although the chain guide is configured as a fixed guide, the pressure-limiting sleeve retaining mechanism of the present invention can also be applied to, for example... Figure 9 The diagram shows a swing guide that is pivotally supported by a shaft within the engine compartment. The chain guide 400, configured as the swing guide, comprises a chain guide body 410 and a pressure-limiting sleeve 150. The pressure-limiting sleeve 150 is inserted into a fixing through-hole 411 formed at one portion of the guide body 410 at its longitudinal end. The pressure-limiting sleeve 150 has a mounting hole 151, which functions as a support hole for mounting bolts or the like, which serve as the swing shaft when mounted on a component. Furthermore, a pressure-limiting sleeve retaining mechanism is provided on the periphery 420 of the hole containing the fixing through-hole 411 and / or on the pressure-limiting sleeve 150.

[0064] The axial length of the cylindrical body of the pressure limiting sleeve 150 is the same as or slightly longer than the thickness in the width direction of the chain guide body 410. With the mounting bolt fixed to the engine compartment, the chain guide 400 can swing freely with the axial movement between the head of the mounting bolt and the mounting surface of the engine compartment restricted, with the mounting bolt as the axis.

[0065] The pressure-limiting sleeve 150 is inserted into the fixing through hole 411, and the mounting bolt (not shown) is inserted through the mounting hole 151 of the pressure-limiting sleeve 150, so that it is screwed and fixed to the threaded hole (not shown) in the engine compartment, thereby installing the chain guide 400. Thus, in the fixing through hole 411 formed in the chain guide body 410, with the cylindrical body of the pressure-limiting sleeve 150 sandwiched between the inner circumferential surface of the fixing through hole 411 and the mounting bolt, it is freely oscillating and installed in the engine compartment.

[0066] Furthermore, although the case where the hole periphery and the chain guide body are integrally formed in the chain guide embodiment described above, they can also be constructed separately. Specifically, the hole periphery can be made into a separate hole periphery member including a through hole for fixing, and the chain guide body body is composed of a chain guide body frame having a receiving hole for receiving the hole periphery member and the hole periphery member. With such a structure in which the hole periphery and the chain guide body frame of the chain guide body are formed separately, the chain guide can be easily processed and manufactured since only the hole periphery (hole periphery member) is attached with a pressure-limiting sleeve holding mechanism, thus enabling the chain guide to be manufactured with high productivity.

[0067] Furthermore, although the above-described embodiment describes the case where the chain guide is installed inside an engine with a timing system, it is not limited to this and can be applied to various types of machines.

[0068] Furthermore, it is not limited to chain-driven transmission mechanisms, but can also be applied to similar transmission mechanisms using belts, ropes, etc., and can be used in various industrial fields.

[0069] Furthermore, for example, the material of the chain guide body can be selected from well-known and suitable synthetic resins based on various conditions such as rigidity, durability, formability, elasticity, and cost. Similarly, the material of the guide block can also be selected from well-known and suitable materials based on various conditions such as elasticity, frictional resistance, rigidity, durability, formability, and cost, with synthetic resin materials being particularly suitable.

Claims

1. A chain guide, comprising: a guide block for slidingly guiding a chain; and a chain guide body supporting the guide block, characterized in that, A pressure-limiting sleeve with a mounting hole is inserted into a through hole in the width direction of the chain guide body. The mounting bolt for mounting the chain guide to the component being mounted is inserted through this mounting hole. A pressure-limiting sleeve retaining mechanism is provided on the periphery of the through hole for fixing on the chain guide body or on the pressure-limiting sleeve to retain the pressure-limiting sleeve. The pressure-limiting sleeve retaining mechanism is composed of thin slices of the following two: One type of thin slice is formed at the periphery of the hole, along the outer edge shape of one end of the fixing through hole, by forming a first annular recess that protrudes into the width direction from one side of the chain guide body. This thin slice is formed between the first annular recess and the inner circumferential surface of the fixing through hole. The thin slice is constituted by the inner circumferential wall of the first annular recess on the fixing through hole side and extends along the entire circumference. The second thin slice is formed by creating a second annular recess that protrudes in the width direction from the other side of the chain guide body. This thin slice is formed between the second annular recess and the inner circumferential surface of the fixing through-hole. The thin slice is constituted by the inner circumferential wall of the second annular recess on the fixing through-hole side and extends along the entire circumference. The first annular recess is composed of multiple arc-shaped grooves that are partially cut by the bridging structure.

2. The chain guide according to claim 1, characterized in that, The pressure-limiting sleeve retaining mechanism is constructed with a tapered shape formed on the inner circumferential surface of the fixing through hole, which tapers towards one side of the axial direction.

3. The chain guide according to claim 1 or 2, characterized in that, A flange portion is formed on the pressure-limiting sleeve in a manner that protrudes radially outward from the root edge, and a locking portion is also formed in a manner that protrudes radially outward from the top edge and locks into the periphery of the hole. The pressure-limiting sleeve retaining mechanism is formed by the locking part of the pressure-limiting sleeve.

4. The chain guide according to claim 1 or 2, characterized in that, The pressure-limiting sleeve retaining mechanism is composed of a concave-convex structure formed on the inner circumferential surface of the fixing through hole.

5. The chain guide according to claim 1 or 2, characterized in that, The periphery of the hole is integrally formed with the chain guide body.

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